3511: Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?
(a) Microscope
(b) Lead plate
(c) Scintillation counter
(d) Spectrophotometer
3512: Who among the following wrote 'The Communist Manifesto' along with Karl Marx ?
(a) Emile Durkheim
(b) Max Weber
(c) Friedrich Engels
(d) Robert Owen
3513: The Dul Hasti Power Station is based on which one of the following rivers?
(a) Chenab
(b) Beas
(c) Ravi
(d) Sutlej
3514: The original inhabitants of India are believed to be of the ethnic type known as
(a) Negrito
(b) Proto-Australoids
(c) Mongoloids
(d) Dravidians
3515: Recently Uttar Pradesh and Madhya Pradesh governments signed a Memorandum of Understanding for the linking of two rivers as a link project. Which are these two rivers?
(a) Betwa and Chambal
(b) Betwa and Ken
(c) Chambal and Son
(d) Ken and Narmada